Kyle Van Noy says his injury is a bit of a mystery

6:20 PM, Aug 23, 2014

DETROIT, MI - AUGUST 09: Johnny Manziel #2 of the Cleveland Browns throws a third quarter pass under pressure from Kyle Van Noy #95 of the Detroit Lions during a preseason game at Ford Field on August 9, 2014 in Detroit, Michigan. (Photo by Leon Halip/Getty Images)